4 years ago

PLZ HELP THIS IS TIMED!

Mathematics

1 answer:

Mkey [24]4 years ago

5 0

Answer:

630

Step-by-step explanation:

(8×15) + (34×15)= 630

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3/4 - 1/6 = ? (simplfy it )

irakobra [83]

Answer:

0.58333333333

Simplify is 0.6

Step-by-step explanation:

i think

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3 years ago

Read 2 more answers

If f(x) =4x2 - 8x - 20 and g(x) = 2x + a, find the value of a so that the y-intercept of the graph of the composite function (fo

amm1812

Answer:

The possible values are a = -2.5 or a = 4.5.

Step-by-step explanation:

Composite function:

The composite function of f(x) and g(x) is given by:

$(f \circ g)(x) = f(g(x))$

In this case:

$f(x) = 4x^2 - 8x - 20$

$g(x) = 2x + a$

$(f \circ g)(x) = f(g(x)) = f(2x + a) = 4(2x + a)^2 - 8(2x + a) - 20 = 4(4x^2 + 4ax + a^2) - 16x - 8a - 20 = 16x^2 + 16ax + 4a^2 - 16x - 8a - 20 = 16x^2 +(16a-16)x + 4a^2 - 8a - 20$

Value of a so that the y-intercept of the graph of the composite function (fog)(x) is (0, 25).

This means that when $x = 0, f(g(x)) = 25$ . So

$4a^2 - 8a - 20 = 25$

$4a^2 - 8a - 45 = 0$

Solving a quadratic equation, by Bhaskara:

$\Delta = (-8)^2 - 4(4)(-45) = 784$

$x_{1} = \frac{-(-8) + \sqrt{784}}{2*(4)} = \frac{36}{8} = 4.5$

$x_{2} = \frac{-(-8) - \sqrt{784}}{2*(4)} = -\frac{20}{8} = -2.5$

The possible values are a = -2.5 or a = 4.5.

5 0

3 years ago

PLEASE HELP, will give brainliest if you answer consider the function represented by the equation 16b = 4r - 12. write the equat

liubo4ka [24]

Answer:b=1/4r-3/4

Step-by-step explanation:

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3 years ago

Which expression is equivalent to (^5sqrt3^2)^1/3

11Alexandr11 [23.1K]

Answer:

3^2/15

Step-by-step explanation:

(^5sqrt3^2)^1/3

(3^2/5)^1/3

multiply the powers

3^2/5*1/3

3^2/15

6 0

3 years ago

18. Express the first amount as a percentage of second.

steposvetlana [31]

Answer:

a. 20%

b. 40%

Step-by-step explanation:

a. 3km =3000m

600/3000×100=20%

b. 3200/8000×100=40%

4 0

2 years ago